The Enduraplas 1550 Gallon Black Cone Bottom Tank is built for full-drain bulk chemical service. At 85 inches wide and 87 inches tall on an 85.0 x 85.0 footprint, this cone bottom tank carries a 1.9 specific gravity rating - the top of the polyethylene scale - so it handles dense process chemicals that would overload a standard 1.5 SG tank. The conical floor means no settling, no dead volume, and a clean gravity drain on every batch. This page answers the three questions that matter before you buy: will it hold your chemical, what does freight look like, and the one mistake that ends a polyethylene tank early.
Will it work for your application
Capacity is 1,550 gallons in a black polyethylene shell. Plan your stand and slab around the loaded weight, not the empty tank: filled with water this tank carries about 12,927 lb, and at its full 1.9 SG rating the contents alone can reach roughly 24,561 lb. A cone bottom tank must sit in a matched steel stand rated for that load - it is not a freestanding flat-bottom vessel. Size the stand and anchoring with our Tank Sizing Calculator and the Tank Sizing Guide, and confirm leg-and-band fitment against the cone bottom tank stand compatibility matrix for Norwesco, Snyder, and Enduraplas. This tank ships as a bare shell - bulkhead fittings and gaskets are selected per chemical and are not included, so plan your top-side vent, fill, level, and drain layout with the tank top fitting placement strategy guide and see the technical drawing on this page for port locations and overall geometry before you build out the system.
Chemical compatibility
Resin type is unconfirmed in our records. This is a black polyethylene tank rated to 1.9 specific gravity, but the resin is recorded as HDLPE with a question mark - crosslinked (XLPE) and linear (HDLPE) polyethylene behave very differently with aggressive oxidizers and solvents, several of which appear in the list below. Call 866-418-1777 to verify HDLPE versus XLPE before ordering for oxidizer service. At the 1.9 SG rating, this tank suits the following chemicals at the concentrations and component materials drawn from the OEM chemical-resistance chart, which is concentration- and temperature-specific - always match your exact strength and operating temperature to the chart:
- Acetic Acid (60%) - PP/PVC fittings, EPDM gaskets
- Aluminum Sulfate (50%) - PVC fittings, EPDM gaskets
- Calcium Chloride (40%) - PVC fittings, EPDM gaskets
- DEF (32.5%) - 316SS fittings, EPDM gaskets
- Ethylene Glycol (100%) - PVC fittings, EPDM gaskets
- Ferric Chloride (50%) - PVC fittings, EPDM gaskets
- Ferric Sulfate (60%) - PVC fittings, EPDM gaskets
- Ferrous Sulfate (20%) - PVC fittings, EPDM gaskets
- Hydrochloric Acid (37%) - PVC fittings, Viton gaskets
- Hydrofluoric Acid (48%) - PP/PVC fittings, Viton gaskets
- Hydrofluosilicic Acid (26%) - PP/PVC fittings, Viton gaskets
- Hydrogen Peroxide (50%) - PVC fittings, Viton gaskets
- Magnesium Chloride (30%) - PVC fittings, EPDM gaskets
- Peracetic Acid (30%) - 316SS fittings, Aflas gaskets
- Phosphoric Acid (85%) - PVC fittings, Viton gaskets
- Polyaluminum Chloride - PVC fittings, EPDM gaskets
- Potassium Carbonate (50%) - PVC fittings, EPDM gaskets
- Potassium Hydroxide (saturated) - PVC fittings, EPDM gaskets
- Propylene Glycol - PP/316SS fittings, EPDM gaskets
- Sodium Bisulfate - PVC/PP fittings, EPDM gaskets
- Sodium Bisulfite - PVC/PP fittings, EPDM gaskets
- Sodium Carbonate (30%) - PVC fittings, EPDM gaskets
- Sodium Hypochlorite (<16.5%) - PVC fittings, Viton gaskets
- Sodium Thiosulfate (40%) - PVC fittings, EPDM gaskets
- Sulfuric Acid (98%) - CPVC fittings, Viton gaskets
- Urea Solution (50%) - PP/PVC fittings, EPDM gaskets
- Zinc Orthophosphate - PP/316SS fittings, EPDM gaskets
- Ozonated Water (up to 10 PPM) - PVC fittings, EPDM gaskets
Watch the gasket column closely - it is where most chem-tank installs go wrong. EPDM covers most salts and bases, but the aggressive acids and oxidizers need Viton: Sulfuric Acid 98% (with CPVC fittings), Hydrogen Peroxide 50%, Sodium Hypochlorite, Hydrochloric Acid 37%, Phosphoric Acid 85%, and all three fluorine acids. Peracetic Acid 30% is the lone outlier, requiring Aflas with 316SS fittings. Confirm your exact fitting and gasket selection by phone before ordering, since the wrong elastomer fails fast. Browse every chemical and concentration in our Chemical Compatibility Database.
The mistake to avoid
The fastest way to ruin a polyethylene chemical tank is treating specific gravity and resin type as interchangeable details. This tank is rated to 1.9 SG, which is the densest-content polyethylene option available - there is no heavier poly tank to step up to, so anything denser than 1.9 belongs in a different material class (steel or FRP) handled through a custom quote, not a thicker poly wall. But a chemical near that 1.9 density still needs the right fittings and gaskets per the chart above, and the resin question (HDLPE vs XLPE) must be settled before you store a strong oxidizer. The second mistake is metering and monitoring: pick the level instrument that survives your chemical with the tank level gauge selection guide, and label the vessel correctly using the tank labeling and signage compliance guide so it passes fire and workplace inspection.
This 1550 gallon black cone bottom tank ships LTL freight from the Enduraplas plant in Neche, ND, with freight quoted live to your ZIP. Because it leaves from a single far-north origin, southern and coastal buyers should pull a number early - get yours with the Freight Cost Estimator before you commit, or call 866-418-1777 to talk through stand sizing, fitting and gasket selection, and chemical service for your exact application.
